    html,
    body {
        margin: 0;
        padding: 0;
        background: url("../imgs/bg.jpg");
        overflow: hidden;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-repeat: no-repeat;
        -webkit-background-size: cover;
        background-size: cover;
        background-position: center 0;
    }

    div {
        width: 480px;
        height: 200px;
        border-radius: 10px;
        padding: 20px;
        margin: 200px auto;
        color:rgb(87, 150, 205);
        background-color: rgba(255, 255, 255, 0.62);
    }

    button {
        color:whitesmoke;
        border: none;
        width: 100px;
        height: 40px;
        border-radius: 5px;
        background-color: rgb(87, 150, 205);
        font-size: 20px;
        margin-left: 38%;
    }